Crescent Lake or Crescent Moon Lake or Yueyaquan (Pinyin: Yuèyá Quán) is a crescent-shaped lake in the oasis, it is 6km south of Dunhuang in the Singing Sands Mountains and is quite literally an oasis in the desert. The Spring's name derives from the crescent moon shape the small pool of spring water has taken between two large sand dunes. Although the area is very dry, the pool doesn't dry up as one might expect.

The Singing Sand Mountains are famous for the sounds the wind makes when blowing over the dunes. Also, the sand is said to be rather noisy when tread upon. The dunes are also famous for their size, some reaching 100m or more, relatively stable despite the fact that the dunes beyond the mountains shift frequently. Also, the sands are said to regain form overnight if tread upon the day before.

In the early 1990s, the area of the lake had shrunken to only 1.37 acre with average depth of 0.9 meter (maximum 1.3 meter). Although local government had plans to restore the depth through filling with water, the lack of budget has delayed their actions. The lake and the surrounding deserts are very popular with tourists, who are offered camel and 4x4 rides. Crescent Moon Lake